Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
2. Subtract the numbers using long subtraction method
Because the upper digit (1) in the ones column is too small to get a positive difference, borrow 1 from the number to the left (80) which becomes (79) and get (11).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 11 | |||
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
Subtract the numbers in the ones column from the top number:
11-2=9
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 11 | |||
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
| 9 |
Subtract the numbers in the tens column from the top number:
9-6=3
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 11 | |||
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
| 3 | 9 |
Subtract the numbers in the hundreds column from the top number:
7-7=0
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 7 | 9 | 11 | |||
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
| 0 | 3 | 9 |
Because the upper digit (0) in the thousands column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (10).
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||
| 7 | 9 | 11 | |||
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
| 0 | 3 | 9 |
Subtract the numbers in the thousands column from the top number:
10-2=8
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||
| 7 | 9 | 11 | |||
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
| 8 | 0 | 3 | 9 |
Subtract the numbers in the ten thousands column from the top number:
6-6=0
| Place value | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||
| 7 | 9 | 11 | |||
| 7 | 0 | 8 | 0 | 1 | |
| - | 6 | 2 | 7 | 6 | 2 |
| 0 | 8 | 0 | 3 | 9 |
The solution is: 8,039
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